About: http://dbpedia.org/resource/World_Digital_Library/launchDate/start

Property	Value
dbpprop:startDateProperty	4 (xsd:integer) 21 (xsd:integer) 2009 (xsd:integer)
dbpprop:wikiPageUsesTemplate	dbpedia:Template:start_date
is dbpprop:launchDate of	dbpedia:World_Digital_Library

About: http://dbpedia.org/resource/World_Digital_Library/launchDate/start_date